电气技术2024，Vol.25Issue(6)：14-23,10.
一种基于经验模态分解和局部极大值点数的配电网高阻接地故障检测方法
A high impedance-grounding fault detection method for distribution network based on empirical mode decomposition and local maximum point number
唐钧益 1曾肖枫 2高伟1
作者信息
- 1. 福州大学电气工程与自动化学院,福州 350108
- 2. 国网福建省电力有限公司泉州供电公司,福建 泉州 362001
- 折叠
摘要
Abstract
The high impedance-grounding fault(HIF)of the distribution network is difficult to detect with conventional equipment due to its weak fault characteristics,which may cause safety issues such as overvoltage,fire,and personal electric shock.This paper introduces a HIF recognition method that combines time-frequency decomposition and threshold judgment.Initially,the zero-sequence current is processed using empirical mode decomposition(EMD).Subsequently,the second intrinsic mode function(IMF)is selected as the feature component and undergoes Gaussian filtering.Ultimately,the number of local maximum points of the feature component is counted to determine whether HIF has occurred.A 10kV distribution network model is constructed using PSCAD/EMTDC software to verify the algorithm.Experimental results indicate that the proposed method can effectively distinguish HIF from various common interference events with a high level of accuracy.Furthermore,it exhibits good adaptability under conditions of noise interference,changes in sampling rate,alterations in the grounding mode of the system's neutral point,and modifications to the system's structure.关键词
配电网/高阻接地故障(HIF)/经验模态分解(EMD)/局部极大值点数Key words
distribution network/high impedance-grounding fault(HIF)/empirical mode decomposition(EMD)/local maximum point number引用本文复制引用
唐钧益,曾肖枫,高伟..一种基于经验模态分解和局部极大值点数的配电网高阻接地故障检测方法[J].电气技术,2024,25(6):14-23,10.
